The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope -- Data Release 3
Loading...
Links to Files
Author/Creator
Author/Creator ORCID
Date
2022-10-06
Type of Work
Department
Program
Citation of Original Publication
Rights
This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
Attribution 4.0 International (CC BY 4.0)
Attribution 4.0 International (CC BY 4.0)
Subjects
Abstract
An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the
Fermi-Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data
release of the 4FGL catalog based on 12 years of E>50 MeV gamma-ray data, where the spectral
parameters, spectral energy distributions (SEDs), yearly light curves, and associations have been
updated for all sources. The new reported AGNs include 587 blazar candidates and four radio
galaxies. We describe the properties of the new sample and outline changes affecting the previously
published one. We also introduce two new parameters in this release, namely the peak energy of
the SED high-energy component and the corresponding flux. These parameters allow an assessment
of the Compton dominance, the ratio of the Inverse-Compton to the synchrotron peak luminosities,